Three‑dimensional particle size determination in a laminar diffusion flame by tomographic laser‑induced incandescence
Bauer F, Yu T, Cai W, Huber F, Will S (2020)
Publication Language: English
Publication Type: Journal article, Review article
Publication year: 2020
Journal
Book Volume: 127
Article Number: 4
Journal Issue: 127:4
DOI: 10.1007/s00340-020-07562-w
Abstract
Non-intrusive measurement techniques are required to gain a comprehensive understanding about the processes of soot forma-tion, growth and oxidation. Time-resolved laser-induced incandescence (TiRe-LII), commonly performed 0D or 2D within a flame, has proven to be a very suitable tool for the in situ sizing of soot primary particles. In this work, the technique is expanded to the third dimension by employing volumetric illumination and coupling it with a tomographic approach, which allows to computationally gain 3D information from 2D images taken at various angles. To minimize experimental cost, an approach using nine fiber bundles arranged in a semicircle around the flame and imaging the light onto a single camera is used. The technique is demonstrated on an ethene diffusion flame on a standard burner, providing spatially resolved 3D particle sizes. One focus of this work is to reveal the influence of input parameters such as the local bath gas temperature, which we measured by two-color pyrometry, and local laser fluence, which are both required for an accurate evaluation of the local particle size. It is shown that the assumption of an average temperature may result in a wrong picture even of qualitative soot size evaluation. In the end, a concept is proposed for a simultaneous determination of the 3D distribution of particle sizes through TiRe-LII and the required bath gas temperature via two-color pyrometry using a tomographic approach with only three cameras.
Authors with CRIS profile
Florian Bauer
Lehrstuhl für Technische Thermodynamik (LTT)
Franz Huber
Lehrstuhl für Technische Thermodynamik (LTT)
Stefan Will
Lehrstuhl für Technische Thermodynamik (LTT)
Involved external institutions
China (CN)How to cite
APA:
Bauer, F., Yu, T., Cai, W., Huber, F., & Will, S. (2020). Three‑dimensional particle size determination in a laminar diffusion flame by tomographic laser‑induced incandescence. Applied Physics B-Lasers and Optics, 127(127:4). https://doi.org/10.1007/s00340-020-07562-w
MLA:
Bauer, Florian, et al. "Three‑dimensional particle size determination in a laminar diffusion flame by tomographic laser‑induced incandescence." Applied Physics B-Lasers and Optics 127.127:4 (2020).
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